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Black rectangular ATX power supply unit with modular cable sockets and a 140mm fan grille

Silverstone

Silverstone SST-HA1650R-PM 1650W power supply

SKU CH-QNGK-QQS7Z MPN SST-HA1650R-PM

Delivers up to 1650W through fully modular cables including 12V-2x6 connectors for PCIe 5 graphics cards, with Cybenetics Platinum efficiency and a silent 140mm FDB fan rated for 50°C continuous

  • Max wattage1650 W
  • Power factor correctionActive
  • Main power connector1 × 24 / 20-Pin motherboard connector 2 × 8 / 4-Pin EPS / AT
  • Cybenetics Platinum efficiency cuts wasted heat and electricity use
  • 1650W continuous output at up to 50°C ambient temperature
  • Fully modular 3rd-gen interface lets you connect only the cables you need
  • 140mm FDB fan runs quietly and keeps spinning after shutdown to clear residual heat
  • All-black flat cables fold easily for tidy routing and better airflow

1650W Platinum ATX 3.1 supply

This fully modular 1650W unit meets ATX 3.1 and PCIe Gen 5 requirements, delivering continuous output at up to 50°C. It targets builders assembling multi-GPU workstations or extreme gaming rigs that demand sustained high-wattage delivery. The Cybenetics Platinum rating confirms high efficiency across typical load ranges.

Thermals and acoustics

A 140mm FDB fan provides cooling and spins down after shutdown to clear residual heat. Active PFC maintains a power factor above .9 at full load, reducing wasted energy. The supply operates from 103 to 264 Vrms at 1650W and from 90 to 264 Vrms at 1350W, accommodating varied mains conditions. Protection circuits include over-current, over-power, over-voltage, short-circuit, over-temperature and under-voltage safeguards.

Build and connectivity

All-black flat cables simplify routing in dense builds, while the third-generation modular interface keeps unused leads out of the case. Japanese electrolytic capacitors are used throughout for long-term reliability. The connector complement includes a 24/20-pin motherboard plug, two 8/4-pin EPS connectors, nine 8/6-pin PCIe plugs, two 12+4-pin 12V-2x6 connectors, sixteen SATA connectors and six 4-pin peripheral connectors.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $384.99
Pricier than about 84% of the 10,869 comparable items (median $142.99).
Max wattage 1650 W
Higher than about 93% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSilverStone
Model nameSST-HA1650R-PM
Part numberSST-HA1650R-PM
Power
Max wattage1650 W
Power factor correctionActive
Main power connector1 × 24 / 20-Pin motherboard connector
2 × 8 / 4-Pin EPS / ATX 12 V connectors
9 × 8 / 6-Pin PCIe connectors
2 × 12+4-Pin 12 V-2 × 6 connectors
16 x SATA connectors
6 × 4-Pin Peripheral connector
1 × 4-Pin Floppy adapter connector
Size & build
Shipping weight0.45 kg
Package size25 × 25 × 25 mm

Questions about this item

How do I connect the 12V-2x6 cables to a PCIe 5.0 graphics card using the third-generation modular interface?

Plug the 12+4-pin cables into the two dedicated 12V-2x6 ports on the PSU side, then attach the other ends to the graphics card; the modular sockets are keyed so they only fit one way.

When should I expect to replace the 140mm FDB fan in this unit?

The fan is rated for 100000 hours MTBF; under continuous 50°C operation that works out to roughly eleven years before a preventive swap is sensible.

At what sustained load does the 103 Vrms minimum input voltage become a limiting factor?

Below 103 Vrms the supply derates to 1350W, so continuous draws above 1350W require a mains voltage of at least 103 Vrms.

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